What is the air quality trend in Four Corners?

Over the past 15 days, Four Corners had an average AQI of 51 based on station measurements. The worst day was 2026-08-05 with AQI 143.

How is Four Corners air quality measured?

Air quality in Four Corners is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Four Corners, United States

Name: Four Corners Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Four Corners, United States.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 6 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	60	47–67	16.7 µg/m³	7h	13
2026-08-07	77	55–122	24.5 µg/m³	24h	13
2026-08-06	115	88–158	41.9 µg/m³	24h	11
2026-08-05	143	105–165	56.9 µg/m³	24h	11
2026-08-04	115	85–159	42.3 µg/m³	24h	13
2026-08-03	34	12–99	9.2 µg/m³	24h	12
2026-08-02	16	10–25	3.7 µg/m³	24h	13
2026-08-01	26	9–65	6.6 µg/m³	24h	13
2026-07-31	29	13–69	7.1 µg/m³	24h	12
2026-07-30	26	12–72	6.5 µg/m³	24h	11
2026-07-29	23	10–62	5.6 µg/m³	24h	12
2026-07-28	31	11–72	7.7 µg/m³	24h	13
2026-07-27	28	9–79	7.2 µg/m³	24h	13
2026-07-26	26	8–66	6.8 µg/m³	24h	12
2026-07-25	20	15–34	4.7 µg/m³	14h	12

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